Its March 14, or 3-14. 3.14 is a special number in the mathematics world - the ratio of a circles diameter to its circumference. As it turns out there is all sorts of fancy things to be done with π. One of the most exciting things about π is its absolute refusal to be fully understood. It is an irrational constant - a decimal that never ends and never repeats.

One blogger made a pi day trivet. Check out Wikipedia’s entry on pi.

Lets celebrate with a big π.